Study on burst risk assessment of coal seam in folded area based on pre-mining stress back analysis [PDF]
, 2023 In order to scientifically evaluate the impact risk of steeply inclined extra-thick coal seam in folded area and provide theoretical guidance for the prevention and control of rock burst, a numerical model including folds is established in this paper ...
Jianqiang CHEN +5 more
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Uncertainty analysis of notch stress concentration factors for welded butt joints [PDF]
ObjectivesThis paper focuses on parametric modeling of a typical butt joint and establishes a finite element model with uncertain geometry of the weld seam, aiming to investigate the stress concentration factor Kt at the weld toe of the butt joint with ...
Chunbo ZHEN +4 more
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Danger-relief principle and parameter optimization of borehole energy relief for rock burst in coal road floor [PDF]
, 2023 The mine area located in northwest of China is seriously affected by horizontal tectonic stress. The borehole is widely used to control coal burst and is an effective, convenient and safe measure.
Tao CHEN
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Study on pressure relief effect of multiple mining of protective layer in medium and long distance coal seam group [PDF]
Aiming at the problem that the effect of protective layer mining of medium and long distance coal seam group under complex conditions is not clear, this study takes the coal seam group mining of Shanxi Xinjing Coal Mine as the engineering background, and
Aitao ZHOU +5 more
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Dianxin kexue中国电信面向横跨多个地域、拥有众多集群的大型政企机构，推出可以高效协同各类资源的广域大数据架构体系——云边智算大数据平台。该平台从集群维度对数据分区进行逻辑抽象，将独立分散的数据集整合为一个“虚拟数据集”，实现了一对多的数据集映射管理。同时，该平台的计算负载数据集具有泛化特征，能够灵活应对不同场景下的数据处理需求。另外，该平台以关系表达式为中间表示，支持多种计算引擎和调度系统，能够在复杂的大型数据处理高容错场景中高效地完成批处理任务负载。目前，云边智算大数据平台已在多种应用场景中落地，平台在5G ...
阮宜龙, 徐雪灵, 法虎, 董丝纶, 姜磊, 杨磊, 燕媛媛
doaj +1 more source
, 2002 利用有限元软件 ,采用三维线性静态方法 ,对常用的 12 7mmIEU钻杆在常见的 11种蚀坑类型下的应力分布进行了计算。计算结果显示钻杆管壁常见蚀坑的应力集中系数在 1 5～2 5之间 ,拉伸和弯曲载荷作用下蚀坑应力分布基本一致 ,弯曲载荷的分析完全可以采用拉伸载荷结果来替代。对一系列的计算结果通过最小二乘法拟合出蚀坑应力集中系数随蚀坑深度和宽度的数学关系表明 ...
刘玉标 +3 more
core
Study on fracture and stress variation characteristics of overlying rock with weakly consolidated gravel layer [PDF]
The western Inner Mongolia region is characterized by widespread weakly cemented soft rock strata, where the presence of thick overlying gravel layers exerts a significant influence on roof failure and stress distribution.
Bo WANG +9 more
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Unloading deterioration and mechanism of rock under different loading and unloading stress paths [PDF]
, 2022 In order to study the failure mechanism of deep coal seam floor under unloading, pseudo-triaxial mechanical tests were carried out under different loading and unloading stress paths.
Fengda ZHANG, Qiuge YU, Yujun ZHANG
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Fatigue Life Prediction for Pre-Corroded Aluminum Alloy 2524based on Stress Severity Factor Method [PDF]
, 2013 腐蚀是金属结构失效的重要原因之一，航空结构的腐蚀损伤常常造成一些灾难性事故。机身结构用高强度铝合金处于含氯化物的腐蚀环境时很容易发生点腐蚀损伤。点蚀坑作为应力集中源，是裂纹容易萌生处，疲劳裂纹优先从腐蚀坑处萌生。腐蚀坑的应力集中情况跟腐蚀坑的深度、大小和形状等特征参数有关。因此，定量研究腐蚀坑特征参数与应力集中系数关系，用应力严重系数法对含腐蚀损伤结构进行疲劳寿命预测具有重要的研究价值。 本文主要研究了腐蚀坑特征参数与应力集中系数的关系及用应力严重系数法对腐蚀预损伤铝合金2524进行疲劳寿命预测。 首先，
赵伟
core
Reasonable width and control technology of narrow coal pillar in gob-side entry driving in deep-buried bump-prone coal seam [PDF]
Aiming at the problem of large deformation of surrounding rock and difficulty of control gob-side entry driving in deep coal seam, taking the setting of narrow coal pillar in gob-side entry driving in deep-buried bump-prone coal seam as the engineering ...
BAN Dingcheng +3 more
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